Bicycle-lock



w. SLINGERLANYD.

BICYCLE LOOK.

(No Model 1 No. 601,047. Patented Mar. 22,1898.

ATTORNEY- @UNITED STATES PATENT Erica.

WILLIAMSLINGERL'AND, OF JAMESTOWN, NEW YORK.

BICYCLE-LOCK.

SPECIFICATION forming part of Letters Patent No. 601,047, dated March22, 1898.

I I Application filed August 25, 1897. Serial No. 649,479. (No model.)

To all whom/it may concerni- Be it known that I,WILLIAM SLINGERLAND, acitizen of the United States, residing at Jamestown, in the county ofChautauqua and State of New York, have invented certain new and usefulImprovements in Bicycle-Locks,

of which the following is a full and complete specification, such aswill enable those skilled in the'art to which it appertains to make anduse the same.

- This'invention relates to bicycle-locks, and more particularly to aclass thereof which is designed to be applied to the sprocket-chain.

The object of my invention is to provide a lock of the above-describedclass which can be attached to the chain in such a manner as willinterfere with the rotation of the sprocketwheel andwhich can bepermanently retained in this position until removed by some person whomay be familiar with the combination of said lock. t

A further object isto provide a lock which is simple in construction,effective in operation, and inexpensive to manufacture.

The invention consists in the novel features of construction hereinafterdescribed, and more particularly pointed out in the claims heretoappended.

Referring to the drawings, Figure 1 is a view of a sprocket-wheel,showing a section'of the chain and my improved lock applied thereto.-

Fig. 2 is a view of said lock detached from said chain and partly insect-ion. Fig. 3 is a plan view of the bottom portion of said lock. Fig.4 is a view looking upward on the line 4 4 of Fig. 2, and Fig. 5 isaplan view of said lock.

Like-letters and numerals of reference refer to like parts throughoutthe several views. Referring to the accompanying drawings, which form apart of this specification, the letter A denotes thesprocket-wheelattached tothe pedal-axle of an ordinary wheel, and B denotes anordinary sprocket-chain. To more fully understand my invention, it wouldbe advisable to insert a brief description of this chain. The ordinarychain as now in use is comprised of two side plates, as 6, which with asolid plate pivoted between its ends metalto require even a mostextraordinary effort to break the same.

My improved lock is composed of two detachable partsa lower part D andan upper is adapted to receive a rod d, attached at one end to a disk fand having centrally mounted on its other end a diamond-shaped plate g,the sharp points of which form two lugs adapted to slide within slots 13in the cavity 1), as shown in Fig. 3. Made integrally with orfirmlyattached to this upper section is a screw it, which is adapted tooperate in the screw-thread in the cavity 1). These slots b extendbeyond the greatest diameter of any portion of the cavity b, so thatwhen in these slots the plate d will be incapable of revolving. Theupper portion E is exteriorly shaped similarly to the lower part, sothat the small cylindrical portion of a diameter equal to that of thebottom portion at a will fit properly between the plates of thesprocket-chain.

The disk f, by reason of the cylindrical cavity and rod d readilyrevolves when the plate 9 is free of the slots b b as in the cavity 19This disk is provided with a series of characters which are designed tobe brought in a certain relation with the top of the upper portion d, inorder that the lugs on the plate 9 may be so brought in relation to thecavity in which it rests as to be capable of being withdrawn therefrom';The slots 1) facilitate this withdrawal.

In operation my improved lock acts as follows: The up perand lowerportions are placed one on each side of the chain and then unitedbetween the plates 6 6 of one link of the said chain by means of thescrew-thread in the cavity 1) and the screw it, made integrally with orfirmly attached to the top portion E, the lugs on the plate 9 havingbeen inserted in the slots 19 b When said portions have ICO been unitedas above described, the disk f is turned, thus bringing the lugs on theplate g into contact with the upper portion of the cavity b securelylocking said device, and prevent its being removed except bya person whois thoroughlyfamiliar with the necessary relative location of thecharacters on the disk f, and an indicator-point on the top of theportion E. The enlarged bases of the respective portions of the devicemaintain the lock in this relation to the chain until by a reversal ofthe operation above described a separation of said parts isaccomplished.

By the construction above described it will be impossible for a personby a sense of touch to inform himself when the plate g is in its properrelation. When the upper portion E is screwed down to the fullestextent, this disk will revolve entirely free of the upper portion ofthis cavity, and if the upper portion is slightly unscrewed it is sobound against the disk as to prevent the rotation of the latter.

By the above-described means it will readilybe observed that the objectsof my invention are attained. A look as above described is cheap inconstruction and will prevent the sprocket-wheel from being rotatedwhile it is attached to the chain and is removable only by a party whois familiar with the necessary position of the various parts in order tounscrew the upper and lower portions.

Having fully described my invention, what I claim, and desire to haveprotected by Letters Patent, is

1. In a bicycle-lock, the combination of two parts united by means of ascrew-thread, and a lock whereby the separation of said parts isrendered impossible except when said lock is in a previously-arrangedrelation with reference to said screw threaded parts, said partsrespectively being provided with means whereby said parts are maintainedin the proper relation to the object to which the lock is applied,substantially as shown and described.

2. In a bicycle-lock, two parts provided respectively with ascrew-threaded cavity, and a screw-thread to operate in said cavity,vertical slots in said cavity adapted to receive a lug on a revolubleplate firmly attached to the screw bearing portion, said lug beingadapted to come in contact with the lower edge of said screw-threadedcavity whereby said parts are locked, said parts respectively beingprovided with means whereby said parts are maintained in the properrelation to the object to which the lock is applied, substantially asshown and described.

3. In a bicycle-lock, two parts, provided respectively with ascrew-threaded cavity, and a screw adapted to operate in said cavity,vertical slots in said cavity adapted to receive lugs on a revolubleplate attached to the screw bearing portion by means of a rod attachedto the revoluble disk at the top thereof, said parts respectively beingprovided with means whereby said parts are maintained in the properrelation to the object to which the lock is applied, substantially asshown and described.

4. In a bicycle-lock, two parts provided respectively with ascrew-threaded cavity, and a screw-thread adapted to operate in saidcavity, vertical slots in said cavity adapted to receive lugs on arevoluble plate, a rcvoluble disk provided with a series of characters,and a connection between said plate and said disk, and an indicatedpoint on said'lock whereby by means of the lugs on said plate the partsmay be brought to a certain prearranged relation, said partsrespectively being provided with an abutment, whereby said parts aremaintained in the proper relation to the object to which the lock isapplied, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of the subscribing witnesses, this 21st day of August,1897.

\VILLIAM SLINGERLAND.

IV itnesses:

L. W. WILTsIE, \VILLIAM BOYD.

